<!DOCTYPE html>
<html xmlns:th="http://www.thymeleaf.org">

<body>
<div th:fragment="nav">
    <nav class="navbar navbar-default">
        <div class="container-fluid">
            <div class="navbar-header">
                <button type="button" class="navbar-toggle collapsed" data-toggle="collapse"
                        data-target="#bs-example-navbar-collapse-1" aria-expanded="false">
                    <span class="sr-only">天院社区</span>
                </button>
                <a class="navbar-brand" th:href="@{/index.html}">天院社区</a>
            </div>


            <div class="collapse navbar-collapse" id="bs-example-navbar-collapse-1">
                <form class="navbar-form navbar-left">
                    <div class="form-group">
                        <input type="text" class="form-control" placeholder="搜索话题">
                    </div>
                    <button type="submit" class="btn btn-default">搜索</button>
                </form>
                <ul class="nav navbar-nav navbar-right">
                    <li><a th:href="@{publish.html}">提问</a></li>
                    <li th:if="${session.user == null}"><a th:href="@{/login.html}">登录</a></li>
                    <li th:if="${session.user == null}"><a th:href="@{/register.html}">注册</a></li>
                    <li class="dropdown" th:if="${session.user != null}" role="presentation">
                        <a class="dropdown-toggle" data-toggle="dropdown" href="#" role="button" aria-haspopup="true" aria-expanded="false">我 <span class="caret"></span></a>
                        <ul class="dropdown-menu">
                            <li><a th:href="@{profile/questions}">我的问题</a></li>
                            <li><a href="#">个人资料</a></li>
                            <li><a href="#">退出登录</a></li>
                        </ul>
                    </li>
                </ul>
            </div>
        </div>
    </nav>
</div>
</body>
</html>